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<title>CryptoAuthLib: atca_helpers.c File Reference</title>
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   <div id="projectbrief">Microchip CryptoAuthentication Library</div>
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<div class="header">
  <div class="summary">
<a href="#define-members">Macros</a> &#124;
<a href="#func-members">Functions</a> &#124;
<a href="#var-members">Variables</a>  </div>
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<div class="title">atca_helpers.c File Reference</div>  </div>
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<p>Helpers to support the CryptoAuthLib Basic API methods.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;stdlib.h&gt;</code><br />
<code>#include &lt;stdio.h&gt;</code><br />
<code>#include &quot;<a class="el" href="a00299_source.html">cryptoauthlib.h</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="a00254_source.html">atca_helpers.h</a>&quot;</code><br />
</div><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a42f1518aca295fab198d042b18fef075"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00251.html#a42f1518aca295fab198d042b18fef075">B64_IS_EQUAL</a>&#160;&#160;&#160;(uint8_t)64</td></tr>
<tr class="separator:a42f1518aca295fab198d042b18fef075"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abd4bf9cd40bc547cd53e2ef325a1c8d0"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00251.html#abd4bf9cd40bc547cd53e2ef325a1c8d0">B64_IS_INVALID</a>&#160;&#160;&#160;(uint8_t)0xFF</td></tr>
<tr class="separator:abd4bf9cd40bc547cd53e2ef325a1c8d0"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gae31a9fd8e9deca79aa5fef0292fe5272"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gae31a9fd8e9deca79aa5fef0292fe5272">atcab_bin2hex</a> (const uint8_t *bin, size_t bin_size, char *hex, size_t *hex_size)</td></tr>
<tr class="memdesc:gae31a9fd8e9deca79aa5fef0292fe5272"><td class="mdescLeft">&#160;</td><td class="mdescRight">Convert a binary buffer to a hex string for easy reading.  <a href="a03535.html#gae31a9fd8e9deca79aa5fef0292fe5272">More...</a><br /></td></tr>
<tr class="separator:gae31a9fd8e9deca79aa5fef0292fe5272"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga121d8391484d9e0c8c0e3f6dbac8285c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga121d8391484d9e0c8c0e3f6dbac8285c">atcab_bin2hex_</a> (const uint8_t *bin, size_t bin_size, char *hex, size_t *hex_size, bool is_pretty)</td></tr>
<tr class="memdesc:ga121d8391484d9e0c8c0e3f6dbac8285c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function that converts a binary buffer to a hex string suitable for easy reading.  <a href="a03535.html#ga121d8391484d9e0c8c0e3f6dbac8285c">More...</a><br /></td></tr>
<tr class="separator:ga121d8391484d9e0c8c0e3f6dbac8285c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga481179181349c801c16fc1ab698f2f24"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga481179181349c801c16fc1ab698f2f24">atcab_hex2bin</a> (const char *hex, size_t hex_size, uint8_t *bin, size_t *bin_size)</td></tr>
<tr class="memdesc:ga481179181349c801c16fc1ab698f2f24"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function that converts a hex string to binary buffer.  <a href="a03535.html#ga481179181349c801c16fc1ab698f2f24">More...</a><br /></td></tr>
<tr class="separator:ga481179181349c801c16fc1ab698f2f24"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga7a929bf65cbc777bab7e533a2755cfad"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga7a929bf65cbc777bab7e533a2755cfad">isDigit</a> (char c)</td></tr>
<tr class="memdesc:ga7a929bf65cbc777bab7e533a2755cfad"><td class="mdescLeft">&#160;</td><td class="mdescRight">Checks to see if a character is an ASCII representation of a digit ((c ge '0') and (c le '9'))  <a href="a03535.html#ga7a929bf65cbc777bab7e533a2755cfad">More...</a><br /></td></tr>
<tr class="separator:ga7a929bf65cbc777bab7e533a2755cfad"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gab3db1b55b966b792e8308a1819933c0e"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gab3db1b55b966b792e8308a1819933c0e">isWhiteSpace</a> (char c)</td></tr>
<tr class="memdesc:gab3db1b55b966b792e8308a1819933c0e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Checks to see if a character is whitespace.  <a href="a03535.html#gab3db1b55b966b792e8308a1819933c0e">More...</a><br /></td></tr>
<tr class="separator:gab3db1b55b966b792e8308a1819933c0e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga592c23e94097ad5e212beb6390aa88c6"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga592c23e94097ad5e212beb6390aa88c6">isAlpha</a> (char c)</td></tr>
<tr class="memdesc:ga592c23e94097ad5e212beb6390aa88c6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Checks to see if a character is an ASCII representation of hex ((c &gt;= 'A') and (c &lt;= 'F')) || ((c &gt;= 'a') and (c &lt;= 'f'))  <a href="a03535.html#ga592c23e94097ad5e212beb6390aa88c6">More...</a><br /></td></tr>
<tr class="separator:ga592c23e94097ad5e212beb6390aa88c6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga78abefc293c0a04d8ef649c94c8a1057"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga78abefc293c0a04d8ef649c94c8a1057">isHexAlpha</a> (char c)</td></tr>
<tr class="memdesc:ga78abefc293c0a04d8ef649c94c8a1057"><td class="mdescLeft">&#160;</td><td class="mdescRight">Checks to see if a character is an ASCII representation of hex ((c &gt;= 'A') and (c &lt;= 'F')) || ((c &gt;= 'a') and (c &lt;= 'f'))  <a href="a03535.html#ga78abefc293c0a04d8ef649c94c8a1057">More...</a><br /></td></tr>
<tr class="separator:ga78abefc293c0a04d8ef649c94c8a1057"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gab7ca9ee391118aafe6f3cf7df4fa5de3"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gab7ca9ee391118aafe6f3cf7df4fa5de3">isHex</a> (char c)</td></tr>
<tr class="memdesc:gab7ca9ee391118aafe6f3cf7df4fa5de3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if this character is a valid hex character or if this is whitespace (The character can be included in a valid hexstring).  <a href="a03535.html#gab7ca9ee391118aafe6f3cf7df4fa5de3">More...</a><br /></td></tr>
<tr class="separator:gab7ca9ee391118aafe6f3cf7df4fa5de3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga39003da4dc8a0b8999f1325c2f96f641"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga39003da4dc8a0b8999f1325c2f96f641">isHexDigit</a> (char c)</td></tr>
<tr class="memdesc:ga39003da4dc8a0b8999f1325c2f96f641"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if this character is a valid hex character.  <a href="a03535.html#ga39003da4dc8a0b8999f1325c2f96f641">More...</a><br /></td></tr>
<tr class="separator:ga39003da4dc8a0b8999f1325c2f96f641"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gad017ae33af5a7ea062cea7d54de675a8"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gad017ae33af5a7ea062cea7d54de675a8">packHex</a> (const char *ascii_hex, size_t ascii_hex_len, char *packed_hex, size_t *packed_len)</td></tr>
<tr class="memdesc:gad017ae33af5a7ea062cea7d54de675a8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Remove white space from a ASCII hex string.  <a href="a03535.html#gad017ae33af5a7ea062cea7d54de675a8">More...</a><br /></td></tr>
<tr class="separator:gad017ae33af5a7ea062cea7d54de675a8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gac873a37c53fdd922d5b36efd737e3ec3"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gac873a37c53fdd922d5b36efd737e3ec3">isBase64</a> (char c, const uint8_t *rules)</td></tr>
<tr class="memdesc:gac873a37c53fdd922d5b36efd737e3ec3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if this character is a valid base 64 character or if this is whitespace (A character can be included in a valid base 64 string).  <a href="a03535.html#gac873a37c53fdd922d5b36efd737e3ec3">More...</a><br /></td></tr>
<tr class="separator:gac873a37c53fdd922d5b36efd737e3ec3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gad10d15454308230fbef54bdd43001ed2"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gad10d15454308230fbef54bdd43001ed2">isBase64Digit</a> (char c, const uint8_t *rules)</td></tr>
<tr class="memdesc:gad10d15454308230fbef54bdd43001ed2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if this character is a valid base 64 character.  <a href="a03535.html#gad10d15454308230fbef54bdd43001ed2">More...</a><br /></td></tr>
<tr class="separator:gad10d15454308230fbef54bdd43001ed2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga175f401662f82c1e2ef822a9e1fd0b57"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga175f401662f82c1e2ef822a9e1fd0b57">base64Index</a> (char c, const uint8_t *rules)</td></tr>
<tr class="memdesc:ga175f401662f82c1e2ef822a9e1fd0b57"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the base 64 index of the given character.  <a href="a03535.html#ga175f401662f82c1e2ef822a9e1fd0b57">More...</a><br /></td></tr>
<tr class="separator:ga175f401662f82c1e2ef822a9e1fd0b57"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga3cf48d232ffbc9000c4d8547120f8b2d"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga3cf48d232ffbc9000c4d8547120f8b2d">base64Char</a> (uint8_t id, const uint8_t *rules)</td></tr>
<tr class="memdesc:ga3cf48d232ffbc9000c4d8547120f8b2d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the base 64 character of the given index.  <a href="a03535.html#ga3cf48d232ffbc9000c4d8547120f8b2d">More...</a><br /></td></tr>
<tr class="separator:ga3cf48d232ffbc9000c4d8547120f8b2d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga55ba8a1787f69d44d6e40db041fbd786"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga55ba8a1787f69d44d6e40db041fbd786">atcab_base64decode_</a> (const char *encoded, size_t encoded_size, uint8_t *data, size_t *data_size, const uint8_t *rules)</td></tr>
<tr class="memdesc:ga55ba8a1787f69d44d6e40db041fbd786"><td class="mdescLeft">&#160;</td><td class="mdescRight">Decode base64 string to data with ruleset option.  <a href="a03535.html#ga55ba8a1787f69d44d6e40db041fbd786">More...</a><br /></td></tr>
<tr class="separator:ga55ba8a1787f69d44d6e40db041fbd786"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaeeff0177acf29e6e7b134a14d7119d69"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#gaeeff0177acf29e6e7b134a14d7119d69">atcab_base64encode_</a> (const uint8_t *data, size_t data_size, char *encoded, size_t *encoded_size, const uint8_t *rules)</td></tr>
<tr class="memdesc:gaeeff0177acf29e6e7b134a14d7119d69"><td class="mdescLeft">&#160;</td><td class="mdescRight">Encode data as base64 string with ruleset option.  <a href="a03535.html#gaeeff0177acf29e6e7b134a14d7119d69">More...</a><br /></td></tr>
<tr class="separator:gaeeff0177acf29e6e7b134a14d7119d69"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga4b7e341b530fcac3f4eaae874bb36422"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga4b7e341b530fcac3f4eaae874bb36422">atcab_base64encode</a> (const uint8_t *byte_array, size_t array_len, char *encoded, size_t *encoded_len)</td></tr>
<tr class="memdesc:ga4b7e341b530fcac3f4eaae874bb36422"><td class="mdescLeft">&#160;</td><td class="mdescRight">Encode data as base64 string.  <a href="a03535.html#ga4b7e341b530fcac3f4eaae874bb36422">More...</a><br /></td></tr>
<tr class="separator:ga4b7e341b530fcac3f4eaae874bb36422"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga1593f87c555ab964d3ebd5edd49aeb0b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00128.html#a22bd6643f31f1d75dc3e7ea939f468cd">ATCA_STATUS</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga1593f87c555ab964d3ebd5edd49aeb0b">atcab_base64decode</a> (const char *encoded, size_t encoded_len, uint8_t *byte_array, size_t *array_len)</td></tr>
<tr class="memdesc:ga1593f87c555ab964d3ebd5edd49aeb0b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Decode base64 string to data.  <a href="a03535.html#ga1593f87c555ab964d3ebd5edd49aeb0b">More...</a><br /></td></tr>
<tr class="separator:ga1593f87c555ab964d3ebd5edd49aeb0b"><td class="memSeparator" colspan="2">&#160;</td></tr>
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Variables</h2></td></tr>
<tr class="memitem:ga50731dca3906502d901f5762aa4d9e71"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga50731dca3906502d901f5762aa4d9e71">atcab_b64rules_default</a> [4] = { '+', '/', '=', 64 }</td></tr>
<tr class="separator:ga50731dca3906502d901f5762aa4d9e71"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga87ae4178e0a5543d5b2192f26e049bd2"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga87ae4178e0a5543d5b2192f26e049bd2">atcab_b64rules_mime</a> [4] = { '+', '/', '=', 76 }</td></tr>
<tr class="separator:ga87ae4178e0a5543d5b2192f26e049bd2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga1cccbbcdbcb7230cc0f8ea8a596feebe"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a03535.html#ga1cccbbcdbcb7230cc0f8ea8a596feebe">atcab_b64rules_urlsafe</a> [4] = { '-', '_', 0, 0 }</td></tr>
<tr class="separator:ga1cccbbcdbcb7230cc0f8ea8a596feebe"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Helpers to support the CryptoAuthLib Basic API methods. </p>
<dl class="section copyright"><dt>Copyright</dt><dd>(c) 2015-2018 Microchip Technology Inc. and its subsidiaries. </dd></dl>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a42f1518aca295fab198d042b18fef075">&#9670;&nbsp;</a></span>B64_IS_EQUAL</h2>

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          <td class="memname">#define B64_IS_EQUAL&#160;&#160;&#160;(uint8_t)64</td>
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<h2 class="memtitle"><span class="permalink"><a href="#abd4bf9cd40bc547cd53e2ef325a1c8d0">&#9670;&nbsp;</a></span>B64_IS_INVALID</h2>

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          <td class="memname">#define B64_IS_INVALID&#160;&#160;&#160;(uint8_t)0xFF</td>
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